CATALOGUE. 81 Some forms resemble G. Eremontii closely. South Park, Colorado, (t59), Utah. Eeodium cicutaeium, L. Her.—Santa Fd, N. Mex. (36 a.) * OxALis viOLACEA, L.—Mount Graham, Arizona, at an altitude of 9,250 feet. (437) RUTACEiE. Canotia* holocantha, Torr. (in Pacific R. R. Rep. iv, 68). Benth. and Hook. 1, 616.—A much branched, leafless tree, 20° high and trunk 1° in diameter; branchlets yellowish-green, delicately striate; sparingly dotted with very minute brown scales, which represent reduced leaves; flowers white or yellowish white; pedicels articulated; bracts small and scale-like; minute cil-glands sparingly seen on the bracts, sepals, and petals. Gila Val¬ ley, Arizona. (323.) Plate I. f From Camp Bowie, Arizona, I have (499) a Ptelea, probably angus¬ tifolia, Benth. CELASTRINEiE. Pachystima Myesinites, Raf—Utah, 5,000 to 7,000 feet altitude. Quite recently, the indefatigable Mr. Canby has brought to light a second species of this genus (P. Canbyi, Gray), in Giles County, Virginia. "While the original P. Myrsinites occurs plentifully in most wooded districts from the * Canotia, Torr.—"Flowers hermaphrodite. Calyx small, 5-lobed, persistent; the broad lobes imbricated in aestivation. Petals 5, hypogynous, oblong, very ohtuse, at base with a broad insertion, im¬ bricated in aestivation, with a rather prominent midrib inside, deciduous. Stamens 5, hypogynous, opposite to the calyx lobes : filaments subulate, somewhat shorter than the petale, persistent: anthers oblong-cordate, introrse, a£Qxed to the filaments in the acute apex of a deep sinus, apiculate with a small mucro; cells inwardly longitudinally dehiscent. Dried pollen becomes 3-horned when moistened. Disk none. Ovary placed ou a gynobase [at flrst thicleer than itself), 5-celled, the thick style at length elongat¬ ing : stigma small, slightly 5-lobed; cells of the ovary opposite to the petals. Ovules in the cells most frequently 6, subhorizontally inserted in two series iu the inner angle [amphitropous] ; micropyle infe¬ rior. Capsule ovate-fusiform, somewhat woody, covered with a delicate, somewhat fleshy epicarp, 5-celled, 10-valved at the apex (at first septicidal aud later loculicidal), terminated by 10 split portions of the persisting style; columella none. Seeds 1-2, filling the cell, ascending, subovate, flattened; testa subcorlaceouB, thickly papillulose, produced below into a broad membranous wing somewhat longer than the nucleus. Embryo straight, iu a thin layer of fleshy albumen; cotyledons oval, flat; the short¬ ish radicle inferior." My own speoimeno showing only the flowers and immature frnit, I have been obliged to quote the above from Dr. Gray's complete description, recently published in Peoc. Amer. Acad. xii, pp. 159-160. t Branch; natural size. Fig. 1. A cross section of a flower. Fig. 2. An open flower. Fig. 3. A longitudinal section of flower. Fig. 4. An inside view of stamen. Fig. 5. An outside view of stamen. Fig. 6. The young fruit; petals fallen and filaments remaining. Fig. 7. A vertical section through a young ovary. Fig. 8. A young ovule. Fig. 9. A vertical section of mature fruit. Fig. 10. A cross section of frnit. Fig. 11. A seed. Fig. 12. A diagonal section of a seed. All except the branch magnified about five diameters. 6 BOT